April 6, 2020 NHTSA CAMPAIGN NUMBER: 20V199000
Driver not Warned when ABS Offline/FMVSS 121, 136
If the driver unknowingly operates the vehicle without the ABS functioning, there would be an increased risk of a crash.
NHTSA Campaign Number: 20V199
Manufacturer PACCAR
Incorporated
Components SERVICE BRAKES, AIR, ELECTRONIC STABILITY CONTROL
Potential Number of Units Affected 455,458
Summary
PACCAR Incorporated (PACCAR) is recalling certain 2008-2019 Peterbilt 330, 335, 337, 340, 348, 365, 367, 384, 386, 387, 388, 389, 567, 579 and 587 vehicles and 2008-2020 Kenworth T170, T270, T370, T660, T680, T800, T880, and W900 vehicles equipped with NAMUX Software. In the event that the Anti-lock Brake System (ABS) loses battery and/or ignition power to the controller, the dash warning light for the ABS may not illuminate to warn the driver of the loss of ABS. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 121, “Air Brake Systems,” and 136, “Electronic Stability Control System on Heavy Vehicles.”
Remedy
PACCAR will notify owners, and dealers will update the NAMUX software within the cab control module, free of charge. PACCAR issued owners an interim notification on June 4, 2020. The recall began May 26, 2020. Owners may contact Kenworth customer service at 1-425-828-5888 or Peterbilt customer service at 1-940-591-4220. PACCAR’s number for this recall is 20pbc AND 20KWB.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
Recall 20KWB: Tractor Anti-Lock Brake System (ABS) Lamp Issue
Federal Recall Information
Supplier
Kenworth Truck Company
Description
If the Tractor ABS controller loses battery and/or ignition power (e.g. the fuse blows) the ABS system will become inoperative. In some configurations, the ABS warning lamp on the dash will not illuminate. Unknowingly operating a vehicle with an inoperative ABS system could lead to an increased risk of an accident or injury.
Release Date
4/17/2020
Introduction
Kenworth Truck Company has determined that certain Vehicle Model Year 2007 through 2019 C500, T440/T470, T600, T660, T680, T800, T880, and W900 vehicles manufactured from January 24, 2007 through January 31, 2018 fail to conform to the following standards:
- U.S. Federal Motor Vehicle Safety Standard (FMVSS) No. 121 – Air brake systems;
- FMVSS No. 136 – Electronic Stability Control Systems on Heavy Vehicles;
- Canada Motor Vehicle Safety Standard (CMVSS) No. 121 – Air brake systems; and
- CMVSS 136 – Electronic Stability Control Systems on Heavy Vehicles.
Fleets may have vehicles included in this recall and in Safety Recall 18KWD.
Situation
237,849 chassis C500, T440/T470, T600, T660, T680, T800, T880, and W900 built from 01/24/2007 through 01/31/2018 equipped with:
- NAMUX2 with software version P30-1030-001 through -114
- NAMUX3 with software version P30-1031-1001 through -120
- NAMUX4 with software version P30-1011-003 through -143
Resolution
This bulletin will be updated as soon as a repair procedure is completed and made available.
It is a violation of Federal law for a dealer to sell or lease new vehicles covered by this recall until the defect or noncompliance has been corrected.
Attachments
June 6, 2020
IMPORTANT SAFETY RECALL
Interim Notification
| Subject: | Safety Recall 18KWD / 20KWB – Tractor Anti-Lock Brake System (ABS) Lamp Issue NHTSA Recall 18V368 / 20V199 This notice applies to your vehicle; VIN: |
Dear Kenworth Customer,
This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act.
Kenworth Truck Company has determined that certain model year 2007 through 2019 C500, T440/T470, T600, T660, T680, T800, T880, and W900 vehicles manufactured during 01/24/2007 through 01/31/2018 fail to conform to Federal Motor Vehicle Safety Standard (FMVSS) No. 121 – Air brake systems and 136 – Electronic Stability Control Systems on Heavy Vehicles.
The Tractor ABS lamp may not illuminate when the vehicle experiences a loss of battery and/or ignition power to the ABS controller. Unknowingly operating a vehicle with an inoperative ABS system could lead to an increased risk of a crash or injury.
If you own multiple vehicles, your vehicles could be on either recall number. Your Kenworth dealer will advise the applicable recall number for each vehicle after the software update becomes available.
| The problem is … | The Tractor ABS Lamp may not illuminate when vehicle experiences a loss of battery and/or ignition power to the ABS controller. |
| What your dealer will do … | Dealers will update the vehicle software after the update is available. |
| What you must do … | When you are notified the software update is available, contact your Kenworth Dealer to schedule an appointment for repair |
Kenworth has initiated a recall to remedy the issue. A software update is not yet available to correct this condition. However, Kenworth is required to notify customers of the existence of the identified issue. Another letter will be mailed when the software becomes available.
If you require further information about this recall, reimbursement of a pre-notification remedy associated with th is recall or experience any difficulty in making arrangements for this repair, please contact Kenworth Customer Service using one of the following:
Email: Kenworth.Customer.Service@paccar.com with the bulletin number in the subject line
or
Mail: Kenworth Truck Company, P.O. Box 1000, Kirkland, WA 98083-1000, Attn: Customer Service Department
or
Phone: 425-828-5888
You may submit a complaint to the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue, S.E., Washington, DC 20590, or call the toll free Vehicle Safety Hotline at 1-888-327-4236 (TTY: 1-800-424-9153); or go to https://www.safercar.gov, if you believe that the manufacturer or dealer failed or was unable to remedy the issue without charge within a reasonable time following the earliest date upon which updated software becomes available.
Federal regulation requires that any vehicle lessor receiving this recall notice must forward a copy of this notice to the lessee within ten days. If you no longer own this vehicle, we would appreciate your advising us of the new owner if you know their name.
We regret any inconvenience that this work may cause you and appreciate your cooperation in this matter.
Thank you,
Annick Hollingsworth
Director of Service Platforms
Kenworth Truck Company
Federal Recall Information
No. 1B20KWB
Tractor Anti-Lock Brake System (ABS) Lamp Issue
Author:
8/31/2020
| Title | 20KWB: Tractor Anti-Lock Brake System (ABS) Lamp Issue |
| Bulletin No. | 20KWB |
| What’s New Abstract | Safety Recall – The Tractor ABS Lamp may not illuminate when the vehicle experiences a loss of battery and/or ignition power to the ABS controller. This may allow the operation of the vehicle without a functional tractor ABS system. |
| Supplier | Kenworth |
| Description | If the Tractor ABS controller loses battery and/or ignition power (e.g. the fuse blows) the ABS system will become inoperative. In some configurations, the ABS warning lamp on the dash will not illuminate. Unknowingly operating a vehicle with an inoperative ABS system could lead to an increased risk of an accident or injury. |
| Release Date | 04/17/2020 |
| Introduction | Kenworth Truck Company has determined that certain Vehicle Model Year 2007 through 2019 C500, T440/T470, T600, T660, T680, T800, T880, and W900 vehicles manufactured from January 24, 2007 through January 31, 2018 fail to conform to the following standards:
Fleets may have vehicles included in this recall and in Safety Recall 18KWD. Revision Notes
|
| Situation | 237,144 chassis C500, T440/T470, T600, T660, T680, T800, T880, and W900 built from 01/24/2007 through 01/31/2018 equipped with:
The NAMUX software illuminates the Tractor ABS/ESC Lamps when the voltage from the ABS/ESC ECU drops below 25% of the battery input voltage present at the CECU. In the instance where the ABS/ESC ECU loses power (i.e. the fuse blows) the voltage being measured may not drop below the 25% voltage threshold, thus the ABS and/or ESC malfunction lamp will not illuminate. |
| Resolution | Service all chassis affected that enter your dealership, even if the customer has no issue with the chassis.
1. Review the attached chassis list for your dealer code and schedule your customer(s) for service if their chassis is on the list. 2. If you are not using Service Management to start repair orders, review DWWC or SIR for “Complete” next to the “20KWB” campaign code prior to performing this repair. 3. Follow the procedures below to update the NAMUX software to the latest available version and verify or set certain software parameters versus Web eCAT.
|
| It is a violation of Federal law for a dealer to sell or lease new vehicles covered by this recall until the defect or noncompliance has been corrected. | |
| Warranty | There is no time or mileage limit for this bulletin, though the repair instructions may be superseded by future software enhancement bulletins. Kenworth will pay for labor:
Take-Off Parts Disposition: N/A
| ||||||||||||||||||||||||||||||||||||||
| Parts | No parts. Software only | ||||||||||||||||||||||||||||||||||||||
| Procedure | Install the latest available version of NAMUX software.
Refer to bulletin 03-064 ESA Best Practices and the attached CECU software update procedure. | ||||||||||||||||||||||||||||||||||||||
| Attachments | CECU software update procedure
NAMUX version to Chassis model cross-reference Dealer\Chassis List Customer Letter | ||||||||||||||||||||||||||||||||||||||
258 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
| KENWORTH | T170 | 2008-2020 |
| KENWORTH | T270 | 2008-2020 |
| KENWORTH | T370 | 2008-2020 |
| KENWORTH | T660 | 2008-2019 |
| KENWORTH | T680 | 2011-2020 |
| KENWORTH | T800 | 2008-2020 |
| KENWORTH | T880 | 2011-2020 |
| KENWORTH | W900 | 2008-2020 |
| PETERBILT | 330 | 2008-2019 |
| PETERBILT | 335 | 2008-2011 |
| PETERBILT | 337 | 2008-2019 |
| PETERBILT | 340 | 2008-2011 |
| PETERBILT | 348 | 2008-2019 |
| PETERBILT | 365 | 2008-2019 |
| PETERBILT | 367 | 2008-2019 |
| PETERBILT | 384 | 2008-2019 |
| PETERBILT | 386 | 2008-2019 |
| PETERBILT | 387 | 2008-2016 |
| PETERBILT | 388 | 2008-2019 |
| PETERBILT | 389 | 2008-2019 |
| PETERBILT | 567 | 2008-2019 |
| PETERBILT | 579 | 2008-2019 |
| PETERBILT | 587 | 2008-2019 |
8 Associated Documents
Non-Compliance Notice 573 Report
RCLRPT-20V199-5012.PDF 215.717KB
Interim Owner Notification Letter(Part 577)
RIONL-20V199-1255.pdf 150.123KB
Interim Owner Notification Letter(Part 577)
RIONL-20V199-1676.pdf 163.117KB
Recall Acknowledgement
RCAK-20V199-1777.pdf 245.252KB
Manufacturer Notices(to Dealers,etc)
ISSUED Owner Notification Letter(Part 577)
RCONL-20V199-9569.pdf 180.082KB
Recall 573 Report- Amendment 1
RCLRPT-20V199-9975.PDF 215.718KB
Remedy Instructions and TSB
RCRIT-20V199-6136.pdf 262.175KB
Latest Recalls Documents
Heavy Duty Truck Reprogramming
Description:
Designed for flexibility, the USB-Link 3 Wired Edition connects to your PC, tablet, or smartphone with a USB cable, allowing techs to directly connect to a device when working in the field or during signal interruptions.
Built to support the latest protocols (CAN FD, DoIP) and compatible with a wide range of OEM diagnostics software, the USB-Link 3 is our most advanced VCI to date, with the performance and technology you can rely on well into the future.
The USB-Link™ 3 comes with the following:
- Latching USB Cable (PN 404032)
- 9-Pin Deutsch Adapter, 1 Meter (PN 493128)
- J1962 Adapter (16-Pin OBD II, 1 Meter (PN 491113)
The USB-Link™ 3: Wireless is also available (PN 121052).
Specifications
Vehicle Network Protocol Support
CAN FD / J1939 FD / ISO15765 FD - 250K, 500K, 1M b/s with auto baud detection
Single wire CAN (SWCAN)
ISO 11898-3 Fault Tolerant CAN (FTCAN)
Diagnostics Over Internet Protocol (DoIP)
J1708
J1850 VPW (Class 2)
ISO PWM (SCP)
ISO 9141 / KWP2000 (ISO 14230) K/L line
ALDL 9600 and 8192 baud
ATEC 160 baud
Windows® Vehicle Communication API
Windows® Vehicle Communication API
RP1210 a/b/c
J2534 (2004 draft)
J2534-1 partial implementation (commercial vehicle focused)
Operating System Compatibility
iOS
Android™
Windows® 10, 11
Interfaces to Computing Platforms
USB 2.0 (vehicle-to-PC connectivity)
Bluetooth® 2.1 + EDR
Wi-Fi (dual band)
Compatible Software
Detroit Diesel Diagnostic Link
CAT Electronic Technician (On-Highway only)
Cummins Insite
International - ServiceMAXX Fleet Pro
Hino eXplorer
Volvo PTT
VCAD Elite Mack/Volvo
V-MAC Service Tools
Allison DOC® For PC-Service Tool - Protocols Supported: J1939, J1708/J1587, and J1850
Allison DOC® For Fleets (1000/2000) - Protocols Supported: J1939, J1850
Allison DOC® For Fleets (3000/4000) - Protocols Supported: J1939, J1708/J1587
Eaton ServiceRanger
Bendix ACom
WABCO Toolbox
Freightliner ServiceLink
International ABS
International DLB
International Intune
International IPC v2.02
PACCAR DAVIE4
Daimler Truck
DiagnosticLink Order Site:
DiagnosticLink Direct Link:
https://diagnosticlink.nexiq.com/DTNA/Default.aspx
- [Wide Compatibility Heavy Duty Truck Scanner] Compatible with a wide range of 12V & 24V heavy-duty trucks across North America, including major truck brands such as Freightliner, Peterbilt, Kenworth, International, Volvo, and Western Star, with support for common diesel engines from Cummins, Detroit, and PACCAR. Whether you're an owner-operator, fleet manager, or repair technician, HD601 helps simplify routine inspections, preventive maintenance, and everyday fault checks. Vehicle coverage may vary by model year, system, and configuration
- [Full-System Diagnostic Truck Scanner] This heavy duty diagnostic scanner supports full-system diagnostics for heavy-duty trucks, including Engine, Transmission, ABS, and more.It helps quickly identify faults, pinpoint problem areas, troubleshoot faster, and understand which systems need attention before repairs. Compatible light-duty vehicles support OBD2 diagnostics only
- [DTC Library + Live Data] This truck diagnostic scanner's built-in DTC library helps truck drivers, DIY users, and more quickly understand fault information. You can also manually enter standard SPN and FMI codes to look up fault details. For roadside situations without internet access, it helps identify possible problem areas
- [2-in-1 Heavy Duty & OBDII Diagnostics] This heavy duty scanner supports both HDOBD and OBDII diagnostics. It provides essential functions including Quick Scan, Full Scan, Live Data, Freeze Frame Data, Fault Code Reading and Clearing, and more. It supports HDOBD protocols such as J1939 and J1587/J1708 for reliable vehicle communication
- [Supports Multiple Vehicle Types] Suitable for various commercial vehicles, including heavy-duty trucks, semi-trucks, buses, and more. This truck scanner diagnostic tool features 6/9/16-pin connectors to support common vehicle interfaces, making it suitable for different vehicle applications and transportation needs
- Boost DPF Performance For Smooth Truck Operation: Facing power loss, weak acceleration or constant DPF warning lights? The DPF regen scan tool offers forced DPF regeneration, DPF Reset, and DPD/DPR functions to clear soot buildup, recover engine output and keep exhaust aftertreatment working properly. Detect DPF‑related errors fast, reduce downtime, and prolong your diesel particulate filter lifespan. Vehicle compatibility varies. Please verify before purchase.
- Full-System Diagnostics with Real-Time Live Data: This truck scanner diagnostic tool covers Engine, ABS, Transmission, SRS, SAS, TPMS and other core vehicle systems. Read & clear fault codes, access live data stream, freeze frame, I/M readiness, DTC lookup and additional practical functions. Leverage real‑time data to quickly locate faults and support reliable repair judgements.
- 7+ Resets ‑ Perform Essential Service Procedures: The heavy duty diagnostic tool comes with 7+ professional service resets. It supports DPF Regen for soot removal, Oil Reset to erase service reminders, Injector Coding for new injectors, DEF Test, Speed Limit Adjustment, Cylinder Cutout for weak cylinder detection, Clutch Relearn for improved clutch engagement. Run these resets after service or component replacement to keep your truck working properly. Available functions vary by vehicle model.
- One Professional heavy duty scanner for 50+ Truck Brands: Compatible with J1939, J1708, J1587, and OBD2/CAN protocols this semi truck scanner delivers wide coverage for mainstream diesel trucks and commercial vehicles. Supported brands include Cummins, Detroit, Caterpillar, Paccar, Volvo, Freightliner, Kenworth, Peterbilt, International, Mack, Isuzu, Hino, Scania, Mercedes-Benz, and more. This single diesel diagnostic scanner lets you service more vehicles and cut down tool investment costs.
- Expert Remote Diagnostic Support: Faced with unexpected truck breakdowns? Equipped with built‑in TeamViewer and tech‑to‑tech support, this diesel truck scanner enables secure real‑time remote connection with professional technicians for diagnosis and troubleshooting. Share live vehicle data and send diagnostic feedback for quicker technical analysis to get expert guidance, no on‑site service required. Minimize downtime, prevent unnecessary repairs and get your truck back on the road sooner.
- BROAD VEHICLE & ENGINE COVERAGE: Professional heavy duty truck scanner for trucks, buses, medium-duty vehicles, construction and agricultural equipment. Supports major brands including Freightliner, Kenworth, Peterbilt, Mack, International, Volvo, Hino and Isuzu, plus Cummins, Detroit, PACCAR, Caterpillar and International A26 engines. J1939/J1708 support covers newer and legacy commercial vehicles. Verify coverage before purchase
- DPF REGEN & DEF/SCR: Diagnose supported diesel aftertreatment systems with DPF regeneration, soot load, differential pressure, exhaust temperature, NOx sensor and DEF level data. Helps identify DPF blockage, excessive soot, DEF/SCR faults, warning lights and derate-related issues, providing key data for faster aftertreatment diagnosis and service
- BIDIRECTIONAL ACTIVE TESTS: Go beyond code reading with two-way component testing. Command and monitor supported injectors, EGR/VGT actuators, cooling fans, fuel pumps and relays to help verify operation. Cylinder cut-off testing helps identify misfires, cylinder contribution and injector-related issues, reducing unnecessary parts replacement
- 40+ DIESEL SERVICE FUNCTIONS: Focused on high-frequency shop tasks including oil reset, injector coding, speed limiter adjustment and idle speed adjustment. Additional service and reset functions support chassis and other routine maintenance needs. Speed and idle adjustments remain within supported manufacturer parameters
- INDUSTRIAL-GRADE DUAL-CHIP HARDWARE: Quad-core 2.0 GHz processor and automotive-grade communication MCU support smooth multitasking and reliable vehicle communication. Wireless VCI offers up to 10 m Bluetooth connectivity. An 8-inch high-brightness display supports glove-friendly use
- HANDLE MORE HEAVY-DUTY JOBS WITH ONE SCANNER — The ANCEL X7HD PRO brings full-system diagnostics, HDOBD/OBD2 diagnostics, 42+ service functions, bi-directional controls, and ECU coding into one heavy-duty scan tool. Built for diesel technicians, repair shops, and fleet maintenance teams that need one scanner for everyday diagnostics, service, active tests, and post-repair work
- TAKE ON 42+ SERVICE & RESET JOBS IN-HOUSE — Perform supported DPF regeneration, injector coding, oil reset, throttle adaptation, EPB reset, ABS bleeding, idle/speed adjustment, and more. Handle more routine maintenance and service work in your own shop or fleet yard instead of relying on a dealer or separate tools for every job
- COMMAND COMPONENTS & CHECK THEIR RESPONSE — Bi-directional control lets you command supported components such as injectors, cooling fans, throttle actuators, and ABS-related systems, then check how they respond. Use active tests to narrow down a problem before tearing things apart or replacing parts, helping you troubleshoot based on actual component behavior instead of fault codes alone
- CODE & MATCH MODULES AFTER REPLACEMENT — Perform supported ECU coding, module matching, adaptations, and relearn procedures when replacing compatible components or control modules. Complete more post-repair setup with the same scanner and help ensure replacement modules are properly configured to communicate with the vehicle
- DIAGNOSE MORE SYSTEMS ACROSS A MIXED FLEET — Read and clear codes, view live data and freeze frame information, and access supported systems including Engine, Transmission, ABS, and Body. Coverage includes compatible Freightliner, Kenworth, Peterbilt, Volvo, Mack, and International trucks; Cummins, Caterpillar, Detroit, PACCAR, and Navistar engines; plus supported OBD2/HDOBD vehicles—giving multi-brand shops and fleets broader coverage from one tool
- Diagnose Heavy-Duty Truck Problems Fast — Read and clear fault codes and diagnose warning light issues on many Class 4–8 diesel trucks including Freightliner, Peterbilt, Kenworth, Volvo, Mack and Cummins-powered vehicles
- Help Reduce Downtime & Repair Costs — It offers full system diagnostics for major trucks meeting standard protocols, along with complete OBD2 functionality. Quickly check engine faults, view live truck data and identify issues before expensive repair shop visits or unnecessary repairs
- No complicated setup required — Simple menus and built-in DTC explanations make this truck code reader easy to use for owner-operators, mobile mechanics and small fleet maintenance
- Live Data & Built-in DTC Lookup — View real-time engine data and built-in truck fault code definitions directly on the scanner to help understand vehicle problems faster without searching through manuals
- Free Lifetime Updates & Technical Support — Includes free software updates plus responsive technical support for setup, compatibility and everyday truck diagnostics
Mack and International, Full-System Diesel Scan Tool for 6/9-Pin HDOBD & OBD2 Vehicles" title="20KWB - Driver not Warned when ABS Offline/FMVSS 121, 136 - 2008-2020 Kenworth 9">
- Built for Heavy-Duty Trucks in Commercial Service: Go beyond basic passenger-car code reading with a heavy duty truck scanner built for real diesel truck service. Helps owner-operators, fleets, repair shops, used-truck businesses, and logistics teams handle everyday truck maintenance, prepare for DPF service, and troubleshoot with more confidence
- Get Back on the Road Faster with DPF Regen & Reset: Help perform DPF forced regeneration and DPF reset on supported Cummins, PACCAR, Caterpillar, Detroit, HD Volvo, Mack, International, and MaxxForce applications. Built-in CAN3 channel access helps complete regen and basic diagnostics without an extra CAN-3 adapter, so you can address soot-related issues sooner and reduce aftertreatment downtime
- Wide Coverage for Daily Service Needs: Works with Diesel OBD and OBD2 systems across Freightliner, Peterbilt, Kenworth, HD Volvo, Mack, International, Western Star, and more. Read vehicle information, clear fault codes, view live data, and perform oil reset on supported Isuzu, Fuso, and Hino applications—helping fleets and shops complete routine checks faster with fewer workflow delays
- Smarter Tools for Faster, More Reliable Repairs: Topology display, wiring diagrams, Pin Detect, and Pre/Post scan reports help technicians visualize system relationships, locate wiring or connector issues, document faults before service, and verify repairs after service. Clear reports help reduce guesswork, avoid rework, and support customer, fleet, and insurance claim documentation
- Free Software Updates, No Annual Fees: Get free software updates for the life of the device, which may help you save hundreds of dollars compared with subscription-based scanners. One-click software updates help keep your scanner current without extra annual fees, giving fleets, repair shops, and owner-operators better long-term value
This product presentation was made with AAWP plugin.